Sementivae

These free days were held every year, but not on certain or fixed days, the time being every year appointed by the magistrates or priests (quotannis a magistratibus vel sacerdotibus concipiuntur).

[1] It was held in honor of Ceres (the goddess of agriculture) and Tellus (Mother Earth).

The festival honoring Ceres occurred one week later, starting February 2.

The Sementina dies were kept in seed-time at Rome for the purpose of praying for a good crop; it lasted only for one day, which was fixed by the pontiffs.

You can help Wikipedia by expanding it.This article about a religious festival is a stub.